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N0. 355,053. Patented Dec. 28, 1886.

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SEWING MACHINE.

No, 355,053. Patented'DecQ 28, 1886.

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N. PETERS, Phulo-Ulhngrlphun Wuhinglnn. D. c

WILLIAM F. BEARDSLEE, OF BOSTON, MASS, ASSIGNOB TO THE MANUFAC- TUBERS SPECIAL MACHINE COMPANY, OF DANBURY, CONN.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 355.053, dated December 28, 1886.

Application filed February 4,1886. Serial No. 190,815. No model.)

To all whom it may concern:

Be it known that I, WILLIAM F. BEARDS- LEE, of Boston, county of Suffolk, and State of Massachusetts, have invented an Improvement in Sewing-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention has for its object to improve that class of machines wherein two eye-poi nted thread-carrying needles penetrate the material, loops from both needles being caught and held by an oscillating looper while the needles ascend, the said looper holding both the said loops in such positionthat they are both entered by but one of the needles at the next de scent of the needle-bar, the result being the formation of a whipstitch from two threads carried by the said two eye-pointed needles.

My improvements in the class of machines referred to relate more especially to mechanism for operating the looper and to means for holding the two needles in the needle-bar.

Figure 1 in side elevation shows a sewingmachine embodying my invention; Fig. 2, a left-hand end elevation of Fig. 1, the cloth plate being in section. Fig. 3 is a plan view with the upright arm and link broken away and the cloth-plate removed; Fig. 4, a face view and section of the cam for operating the looper, the said figure showing the adjustable tapering roll in the groove of the can]; Fig. 5, details of the looper; Fig. 6, a diagram showing parts of the two needles, the hook, and the end of the feed-bar and its operating-eccentric; and Fig. 7 is a sectional detail in the line 00, Fig. 2.

The frame work A, needle-actuating arm A, link A main rotating shaft A feed-bar A, and clothplate A are substantially the same as in the Willcox 8t Gibbs sewing-machines.

The forward and backward movements of the feed-bar are obtained through a rocker, 13, attached to a rock-shaft, B, and operated by a link,B ,havin g at one end an eccentric-strap, which embraces an eccentric,'B in usual manner.

The frame-work of the machine has attached to it by screws a a bracket, b, the said bracket having at its front side two bearings, 12 b, for the looper-shaft c, and extending backward an arm, b (see Fig. 1,) which has at its end a bearing, b, for the reception of the rock-shaft d, to which is attached the segment (1, which engages the bevel-gear'c, fast on the loopershaft 0, the said looper-shaft being oscillated and carrying the looper c", the shank of which is adjustably attached by the set-screw 0 to a head,- c forming an integral part of the loopershaft 0.

The rock-shaft at its inner end, has attached to it by screw (1 an arm, (2 provided with a conical stud, (1, having a screw-threaded shank, (P, by which the said stud may be moved or adjusted longitudinally with relation to the said arm, the stud being retained in, adjusted position by a set-nut, 2, the conical portion of the said stud receiving upon it a conical roll 'or shell,which enters a tapering groove in the holding these collars upon the shaft may be' loosened, and the said shaft may thereafter be moved longitudinally to compensate for wear between the segment (1 and the bevel-gear c, after which the said collars will be fastenedin place. Sufficient space is left between the'hub of the arm (1 and the end of the bearing 1) to allow for this longitudinal movement of the shaft (1.

The needle-bar at its lower end is drilled to leave two holes for the reception of the shanks of the two eye-pointed thread-carrying penetrating-needles g g, the said two holes being so bored as to intersect, as shown in Fig. 8,, and enable the shanks of the two needles placed therein to come in contact.

The needle-bar is bored from its side, forming a clear opening to intersect the central bore, and thereby permit'the screw 71, engaging a screw-thread in acollar, h, to be passed into the said clear opening and act against the shank of the centermost needle, the said screw, when turned to enter the said collar and act against the centerrnost needle, also causing the collar to be drawn against the needle-bar at its rear side, the said screw and collar, put together as described, effectually holding both-needles in is made available to hold both needles.

The eye of one needle is set lower than the eye of the other needle, so as to enable the loops in the thread carried by the said needles to be entered by the oscillating looper 0 the latter being made adjustable in its holdingblock a, to thereby enable the looper and its shoulder 10 to properly co-operate with the loops of needle-thread under any adjustment of the parts.

The stitch made by the mechanism herein described is substantially that made by the machine described in application, Serial N 0. 167,679, filed June 4, 1885, made by A. Morehouse.

I claim- 1. The needle-bar, its two eye-pointed reciprocating needles,the looper, its rock-shaft provided with a pinion, and the sector, combined with the rock-shaft d and means, substantially as described, to oscillate it.

2. The shaft A its attached cam having a tapering groove, and the rock-shaft d, having an arm, (P, and its attached adjustable conical stud, combined with the segment (1', the looper, the looper-shaft, and its attached bevel-gear, substantially as described.

3. The needle-bar provided at its lower end with two intersecting parallel holes for the reception of the shanks of two needles, and with a'clear opening for the free entrance of a screw,

and two needles in the said holes, with their 

